Brainiac
Super Freak
I don't think the AoU BW suit was all that bad. I do think her TWS and Avengers suits were better though. I agree the light up blue piping on the AoU suit was hardly something a secret spy would have, being that you'd think a spy would want to be as inconspicuous and surreptitious as possible. Far from being the "silliest" spy outfit ever though.
I realize the film crew and Stark was trying to "upgrade" everyone's suits to look "cooler".